ransomexx_win | e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162

Analysis

max time kernel
122s
max time network
124s
platform
windows7_x64
resource
win7v20210410
submitted
20-08-2021 16:21

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General

Target

e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
Size

156KB
MD5

ca2326886fa699068c44f32b3e51adaf
SHA1

3555aaebe6c113fb8f923a38cb3bd75da6e86277
SHA256

e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162
SHA512

d7da00f22fede4909c29d5c6125f2b5749453cefa65c262133d50cf7235fc9d3b134e5b2d5740f08e8db3fc70c21de8bed42deb84a5ca31108a7968026b7ed9e

Score

10^/10

ransomexx_win evasion ransomware

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\!TXDOT_READ_ME!.txt

Ransom Note

Greetings, Texas Department of Transportation! Read this message CAREFULLY and contact someone from IT department. Your files are securely ENCRYPTED. No third party decryption software EXISTS. MODIFICATION or RENAMING encrypted files may cause decryption failure. You can send us an encrypted file (not greater than 400KB) and we will decrypt it FOR FREE, so you have no doubts in possibility to restore all files from all affected systems ANY TIME. Encrypted file SHOULD NOT contain sensitive information (technical, backups, databases, large documents). The rest of data will be available after the PAYMENT. Infrastructure rebuild will cost you MUCH more. Contact us ONLY if you officially represent the whole affected network. The ONLY attachments we accept are non archived encrypted files for test decryption. Speak ENGLISH when contacting us. Mail us: [email protected] We kindly ask you not to use GMAIL, YAHOO or LIVE to contact us. The PRICE depends on how quickly you do it. �

Emails

[email protected]

Signatures

Deletes NTFS Change Journal 2 TTPs
The USN change journal is a persistent log of all changes made to local files used by Windows Server systems.
ransomware

Inhibit System Recovery
T1490

Data Destruction
T1485
RansomEXX Ransomware
Targeted ransomware with variants which affect Windows and Linux systems.
ransomware ransomexx_win
Clears Windows event logs 1 TTPs
evasion ransomware

Indicator Removal on Host
T1070

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1488	bcdedit.exe
756	bcdedit.exe

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command-Line Interface

T1059

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
964	wbadmin.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Modifies extensions of user files 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\UnprotectSelect.raw => C:\Users\Admin\Pictures\UnprotectSelect.raw.txd0t	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
File renamed	C:\Users\Admin\Pictures\BackupProtect.raw => C:\Users\Admin\Pictures\BackupProtect.raw.txd0t	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
File renamed	C:\Users\Admin\Pictures\MergeComplete.png => C:\Users\Admin\Pictures\MergeComplete.png.txd0t	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
File renamed	C:\Users\Admin\Pictures\RedoMove.raw => C:\Users\Admin\Pictures\RedoMove.raw.txd0t	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
File renamed	C:\Users\Admin\Pictures\SaveBlock.tif => C:\Users\Admin\Pictures\SaveBlock.tif.txd0t	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
File renamed	C:\Users\Admin\Pictures\UnblockUndo.crw => C:\Users\Admin\Pictures\UnblockUndo.crw.txd0t	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe

Overwrites deleted data with Cipher tool 1 TTPs
Cipher is a Windows tool which be used to securely wipe deallocated HDD space, preventing recovery of deleted data.
ransomware

Inhibit System Recovery
T1490

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\D:	cipher.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeSecurityPrivilege	928	wevtutil.exe
Token: SeBackupPrivilege	928	wevtutil.exe
Token: SeSecurityPrivilege	1908	wevtutil.exe
Token: SeBackupPrivilege	1908	wevtutil.exe
Token: SeSecurityPrivilege	1080	wevtutil.exe
Token: SeBackupPrivilege	1080	wevtutil.exe
Token: SeBackupPrivilege	1928	wbengine.exe
Token: SeRestorePrivilege	1928	wbengine.exe
Token: SeSecurityPrivilege	1928	wbengine.exe
Token: SeSecurityPrivilege	1940	wevtutil.exe
Token: SeBackupPrivilege	1940	wevtutil.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 1056 wrote to memory of 756	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	54
PID 1056 wrote to memory of 756	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	54
PID 1056 wrote to memory of 756	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	54
PID 1056 wrote to memory of 756	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	54
PID 1056 wrote to memory of 852	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	53
PID 1056 wrote to memory of 852	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	53
PID 1056 wrote to memory of 852	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	53
PID 1056 wrote to memory of 852	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	53
PID 1056 wrote to memory of 1544	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	33
PID 1056 wrote to memory of 1544	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	33
PID 1056 wrote to memory of 1544	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	33
PID 1056 wrote to memory of 1544	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	33
PID 1056 wrote to memory of 1488	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	32
PID 1056 wrote to memory of 1488	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	32
PID 1056 wrote to memory of 1488	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	32
PID 1056 wrote to memory of 1488	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	32
PID 1056 wrote to memory of 928	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	31
PID 1056 wrote to memory of 928	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	31
PID 1056 wrote to memory of 928	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	31
PID 1056 wrote to memory of 928	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	31
PID 1056 wrote to memory of 964	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	51
PID 1056 wrote to memory of 964	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	51
PID 1056 wrote to memory of 964	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	51
PID 1056 wrote to memory of 964	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	51
PID 1056 wrote to memory of 1940	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	50
PID 1056 wrote to memory of 1940	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	50
PID 1056 wrote to memory of 1940	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	50
PID 1056 wrote to memory of 1940	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	50
PID 1056 wrote to memory of 1008	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	48
PID 1056 wrote to memory of 1008	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	48
PID 1056 wrote to memory of 1008	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	48
PID 1056 wrote to memory of 1008	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	48
PID 1056 wrote to memory of 1908	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	34
PID 1056 wrote to memory of 1908	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	34
PID 1056 wrote to memory of 1908	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	34
PID 1056 wrote to memory of 1908	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	34
PID 1056 wrote to memory of 1080	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	46
PID 1056 wrote to memory of 1080	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	46
PID 1056 wrote to memory of 1080	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	46
PID 1056 wrote to memory of 1080	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	46
PID 1056 wrote to memory of 824	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	36
PID 1056 wrote to memory of 824	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	36
PID 1056 wrote to memory of 824	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	36
PID 1056 wrote to memory of 824	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	36
PID 1056 wrote to memory of 796	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	52
PID 1056 wrote to memory of 796	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	52
PID 1056 wrote to memory of 796	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	52
PID 1056 wrote to memory of 796	1056	e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe	52

C:\Users\Admin\AppData\Local\Temp\e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe
"C:\Users\Admin\AppData\Local\Temp\e55fcf9315c52d2abd3431f7e4bb82cbd2b0d24d124e0e1a27b951030b2de162.exe"
1⤵
- Modifies extensions of user files
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1056
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" sl Security /e:false
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:928
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} bootstatuspolicy ignoreallfailures
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:1488
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Change /TN "\Microsoft\Windows\SystemRestore\SR" /disable
  2⤵
  PID:1544
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Security
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1908
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:C:
  2⤵
  PID:824
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Setup
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1080
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Application
  2⤵
  PID:1008
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl System
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1940
- C:\Windows\System32\wbadmin.exe
  "C:\Windows\System32\wbadmin.exe" delete catalog -quiet
  2⤵
  - Deletes backup catalog
  PID:964
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:D:
  2⤵
  - Enumerates connected drives
  PID:796
- C:\Windows\System32\fsutil.exe
  "C:\Windows\System32\fsutil.exe" usn deletejournal /D C:
  2⤵
  PID:852
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} recoveryenabled no
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:756

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1928

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:780

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:904

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Privilege Escalation

Defense Evasion

File Deletion

T1107

Indicator Removal on Host

T1070

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Data Destruction

T1485

Inhibit System Recovery

T1490

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1008-74-0x000007FEFBFF1000-0x000007FEFBFF3000-memory.dmp

Filesize
8KB

Download
memory/1056-61-0x0000000005B40000-0x0000000005F4B000-memory.dmp

Filesize
4.0MB

Download
memory/1056-60-0x00000000766D1000-0x00000000766D3000-memory.dmp

Filesize
8KB

Download